写一个完整的带版税nft合约

当然，我可以帮您回答这个问题。下面是一个例子：

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract MyNFT is ERC721 {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    uint256 public constant ROYALTY_FEE = 10; // 10%
    uint256 public royaltyAmount;
    address public royaltyBeneficiary;

    constructor(address _royaltyBeneficiary) ERC721("MyNFT", "NFT") {
        royaltyBeneficiary = _royaltyBeneficiary;
    }

    function mint(address _to, string memory _tokenURI) public returns (uint256) {
        _tokenIds.increment();

        uint256 newItemId = _tokenIds.current();
        _safeMint(_to, newItemId);
        _setTokenURI(newItemId, _tokenURI);

        return newItemId;
    }

    function setRoyaltyBeneficiary(address _newBeneficiary) public {
        require(msg.sender == royaltyBeneficiary, "Only current beneficiary can change.");
        royaltyBeneficiary = _newBeneficiary;
    }

    function transferFrom(
        address _from,
        address _to,
        uint256 _tokenId
    ) public payable override {
        require(_checkRoyaltyFee(msg.value), "Not enough Ether sent.");
        super.transferFrom(_from, _to, _tokenId);
        royaltyAmount = msg.value;
    }

    function _checkRoyaltyFee(uint256 _amount) internal view returns (bool) {
        return _amount * 100 / ROYALTY_FEE == royaltyAmount * 100;
    }

    function withdrawRoyalty() public {
        require(msg.sender == royaltyBeneficiary, "Only royalty beneficiary can withdraw.");
        uint256 amount = royaltyAmount;
        royaltyAmount = 0;
        payable(msg.sender).transfer(amount);
    }
}

上面的合约可以让您创建一个 ERC721 标准的 NFT 合约，并包含版税功能。当合约中的 NFT 进行转移时，合约会收取 10% 的转移费用，并分给版税接收人。